Jet is attacked from behind inside her parents' home on Halloween night and left unconscious.

Jet's neurosurgeon reveals a skull fracture will cause a fatal brain aneurysm within seven days.

Jet refuses surgery and tells her family she will spend her final days solving her own murder.

Jet visits the crime scene and learns the attacker entered through the back door to avoid security cameras.

Using her Apple Watch, Jet determines her phone's last location was near River Street before it was shut off.

Reviewing Halloween Fair photos, Jet and Billy discover both JJ and Andrew wore identical red wigs that night.

Jet smashes through freshly poured concrete at the North Street construction site and unearths her phone and the murder weapon.

Jet and Billy examine old Ring camera footage and discover Sophia swapped Scott's blood pressure pills with salt.

Sophia admits to Jet that she replaced Scott's pills hoping he would fall ill and retire early.

Jet and Billy barely escape the Mason Construction office building as it is engulfed in flames.

Police arrest JJ for Jet's assault after matching the synthetic hair and tracing a loan to his account, but Jet remains unconvinced.

Jet holds Luke at gunpoint and forces him to confess he accidentally drowned Emily after she revealed Scott was not his father.

Jet's brain aneurysm ruptures during her confrontation with Billy over the missing hammer, and she dies in his arms.

Billy confronts his father Jack at home with the evidence and forces him to confess to attacking Jet.

After hearing Jack's confession, Luke grabs a gun and shoots Jack dead outside the Mason family home.

On Halloween night, Jet Mason is attacked in her parents' home and wakes up in the hospital with a fatal brain injury. Given fewer than seven days to live, she refuses surgery and declares she will spend her remaining time solving her own murder. Her investigation leads her to uncover the murder weapon buried beneath fresh concrete at a family construction site, exposing secrets that stretch far beyond her attack. As her physical condition worsens and police pursue the wrong suspect, Jet digs deeper into her family's past, ultimately forcing a confession from her brother Luke about a crime committed years earlier. The case is finally resolved after Jet's death, when Billy confronts his own father Jack with the truth, and Luke's rage brings the story to its violent conclusion.

The headline events of Jet Mason's final seven days.

JJ approaches Jet in the house of mirrors at the Halloween Fair and tries to discuss their breakup.

Drunk Andrew Smith confronts Jet at the Halloween Fair, blaming her family for destroying everything they touch.

Jet leaves her parents' house after a heated argument with her mother over the surgery and moves into Billy's apartment.

Andrew reveals that Dianne got Nina fired and Luke forced Andrew to sell his home; Nina later died by suicide.

Andrew tells Jet that Scott plans to sell Mason Construction to Chief Jankowski's wife, Nell, news that stuns Jet.

Jet spots Nell at the bar during Billy's performance and confirms that Scott intends to sell Mason Construction to her.

Jet visits JJ's brother Henry, who answers the door pointing a gun at her and denies ever working for Mason Construction.

Jet's aneurysm has formed and begun to leak, causing sudden arm paralysis and double vision; Dr. Lee confirms the news.

Jet tells Luke that Scott is planning to sell Mason Construction; Luke violently punches his steering wheel in a rage.

Jet and Billy break into the Mason Construction offices and find forged invoices and workers missing from the payroll.

Henry admits to Jet and Billy that Luke beat him up the night of Jet's attack after he threatened to expose the fraud.

Town Trustee Gerry Clay mentions that a masked figure once interrupted a town board meeting to threaten Mason Construction.

Billy distracts Andrew at the bar while Jet breaks into his upstairs apartment and finds Nina's laptop inside a box of her belongings.

Jet is arrested on suspicion of arson and held in a jail cell, where she writes farewell letters to her family and a will.

Dianne, Scott, and Sophia appear in the doorway of the Mason home as Jack collapses and dies in the backyard.

Before the attack, Jet's final evening at the Halloween Fair is marked by tension with both her ex-boyfriend and a hostile local named Andrew Smith, who blames the Mason family for ruining his life. After waking up in the hospital, Jet moves out of her parents' house and into Billy's apartment, beginning an investigation that pulls her deeper into Woodstock's resentments. Andrew's drunken conversation at a bar turns out to be a goldmine, revealing the fates of Nina and her father alongside the shocking news that Scott plans to sell Mason Construction to a rival. As Jet presses further, she uncovers employment fraud inside her family's business, is temporarily jailed on suspicion of arson, and grows too ill to continue. The story closes with Jack's violent death witnessed by the very family whose secrets set the whole tragedy in motion.

The secondary threads and relationships that shaped the investigation.

Billy finds Jet unconscious and covered in blood in her parents' living room and calls 911.

Police question Jet in the hospital and reveal that JJ has not been heard from since the night of the attack.

Reviewing Ring camera footage, Jet notices that Sophia visited her parents' house twice on the day of the attack.

At a family breakfast, Jet confronts Luke and Sophia about their alibis; Sophia claims she returned because she forgot her phone.

Jet and Billy review older Ring footage of Sophia's past visits and identify the moment she swapped Scott's pill bottle.

Sophia warns Jet that if she tells Luke about the pills, she will reveal the truth about why Billy's mother really left.

Jet and Billy watch a recorded town board meeting and identify the masked figure as Nina based on a window visible in the background.

Nina's old Facebook messages reveal that Emily had discovered a secret about Luke and was planning to tell Nina before she died.

Jet and Billy search through Billy's mother's old belongings and find a calendar note that reads 'He was already wet. Before.'

Sophia tells Billy the real reason his mother left, and Billy storms away from Jet in anger.

Billy bails Jet out of jail and is waiting for her outside the police station, giving her another day to solve her murder.

Luke admits his real father helped him cover up Emily's drowning but refuses to name him; Jet secretly slips a tracker into Luke's coat.

Jet finds a toolbox in Billy's closet and discovers it is missing a hammer that matches the murder weapon.

Billy realizes his mother's diary note 'already wet' referred to Jack Finney, not Luke, placing Jack at the pool the day Emily died.

Jack confesses to Billy that he killed Jet out of bitterness after Dianne ended their affair and to protect Luke's inheritance of the company.

From the moment Billy finds Jet unconscious on Halloween night, the investigation is driven by a series of revelations that keep dismantling what everyone thought they knew. Jet's review of Ring camera footage exposes Sophia's deception, and digging into older recordings reveals that she had been poisoning Scott for months. A recorded town board meeting and Nina's old Facebook messages point toward a long-buried secret about Emily, while Billy's mother's old calendar provides the clue that ultimately identifies the true killer. Before Jet can act on everything she has uncovered, her aneurysm ruptures, and Billy is left to finish what she started. His realization that the diary note pointed to his own father brings the investigation to a devastating close, ending with Jack's forced confession.